A device and method for assembling four sections of a ship on water

Abstract

The present invention discloses an on-water closing device and method for four-section ship. In the third step, the on-water closing method first roughly aligns the two closing sections, then measures the deck closing mouth ring seam joint line, the ship centerline and the longitudinal section line again, and then roughly butts before welding, and then accurately butts after careful measurement. In the process of roughly butt jointing, the butt joint accuracy requirement is reduced, the butt joint speed can be appropriately accelerated, and the butt joint is accurately butt jointed after careful measurement, thereby improving the butt joint accuracy. Therefore, the butt joint efficiency is improved, the butt joint accuracy is guaranteed, and the assembly deviation is met.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a device and method for assembling four sections of a ship on water. Background Art

[0002] There are generally three solutions to the construction capacity of slipway facilities that far exceeds the traditional overall launching capacity of the shipyard: one is to build or expand the existing slipway or dock; one is to find and rent slipways or docks at home and abroad that can meet the construction of the project; the other is to adopt the method of building in sections and closing them together on the water. The first two are a traditional follow-up method, which is to implement the construction first and then seek product goals. For the shipbuilding industry, which mainly relies on single-piece orders, the investment risk is huge. The latter breaks the traditional concept, improves the construction capacity through process and technology innovation, adapts to the product market, and avoids taking a lot of investment risks. It is an innovative, practical and effective technology. However, the traditional water closing method requires careful observation of the insertion of the docking tooling during the pulling and closing process. If there is a deviation, the hoist should stop tightening in advance and adjust the position by tugboat or towing or pushing. The process is inefficient. Summary of the invention

[0003] The object of the present invention is to provide a device and method for assembling four sections of a ship on water, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] The present invention provides a method for assembling four sections of a ship on water, comprising:

[0006] Step 1: After the 04 section is launched, it is ballasted and leveled, moored at the outfitting dock, and the cables are secured;

[0007] Step 2: The 03 block is launched, pumped and leveled, berthed at the outfitting dock, and the water is continued to be pumped to make the draft of the 03 block smaller than the draft of the 04 block;

[0008] Step 3: Hang the closing rope of the closing winch, and the closing winch will pull the 03 section at the same time, and the other mooring ropes of the 03 section will cooperate with the elastic rope;

[0009] Step 4: When the 03 section closing end face is 300mm away from the 04 section closing end face, hang the traction device, and the assembly personnel measure the deck surfaces of the two sections. The 03 section is symmetrically ballasted so that the two deck surfaces are on the same plane. The distance between the closing lines of the two sections is measured. The inspection lines on the deck should be flush, and the inspection line spacing on the side should be greater than 400mm.

[0010] Step 5: Continue to pull together through the traction device to achieve the locking action of the centering limit device, measure the deck closing mouth ring seam joint line, ship centerline and longitudinal section line again, meet the assembly deviation requirements, and weld the assembly code plate;

[0011] Step 6: Adjust the ballast water, complete the pressing of the bottom structure, re-measure the deck level, complete the welding of the bulkhead structure and the side structure, and carry out the welding of the joints of the two sections;

[0012] Step 7: Repeat steps 1 to 6 to complete the closure of section 02 and section 01.

[0013] The beneficial effects of the present invention are:

[0014] In the third step of the above-water closing method, the two closing sections are roughly aligned, and then the deck closing mouth ring seam joint line, the ship centerline and the longitudinal section line are measured again. Before the closing welding, the two sections are roughly butted, and then the precise butt joint is made after careful measurement. In the rough butt joint process, the butt joint accuracy requirements are reduced, and the butt joint speed can be appropriately accelerated. After careful measurement, the precise butt joint is made to improve the butt joint accuracy. Therefore, the butt joint efficiency is improved, the butt joint accuracy is guaranteed, and the assembly deviation is met.

[0015] As a further improvement of the above technical solution, in the first step, the 04 main section is pressurized and leveled to the closing water level of 2510mm, and in the second step, the draft of the 03 main section is around 2450mm.

[0016] As a further improvement of the above technical solution, in the third step: the pulling and closing direction of the 03 total section should face the direction of the water flow, and the pulling and closing action should be smooth and slow. By using the effect of the water flow, the pulling and closing force can be reduced, and the docking can be more cost-effective.

[0017] As a further improvement of the above technical solution, the traction device includes a hand winch.

[0018] As a further improvement of the above technical solution, the assembly deviation should meet the requirements of the "China Shipbuilding Quality Standards".

[0019] As a further improvement of the above technical solution, temporary bulkheads are set at each section so that the four corners of each section form independent cabins to ensure the floating state of each section after launching. By setting up independent cabins, the floating state of each section after launching is met during the docking process, which helps to dock each section more accurately.

[0020] As a further improvement of the above technical solution, after the temporary cabin is set up, the end face margin is precisely measured and trimmed to ensure that the total section can be directly butted and closed without cutting the margin when closing it on water.

[0021] As a further improvement of the above technical solution, the two sections are pre-jointed on the slipway before launching to determine whether the end faces of the two sections can meet the closing conditions.

[0022] The present invention also provides an underwater closure device for four sections of a ship, including a deck limiting assembly, wherein the deck limiting assembly includes a first clamping piece and a second clamping piece arranged on the decks of adjacent sections, wherein the first clamping piece is provided with a V-shaped groove, and the second clamping piece is provided with a V-shaped protrusion engaged with the V-shaped groove.

[0023] It assists docking, and the V-shaped groove and V-shaped protrusion meet the requirements of rough docking and the needs of later precise docking, while playing a guiding and positioning role.

[0024] As a further improvement of the above technical solution, the first clamping member and the second clamping member each include two positioning plates arranged at an angle and a reinforcement structure arranged on the positioning plates. The reinforcement structure improves the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0026] Figure 1 This is a schematic diagram of an embodiment of a method for assembling four sections of a ship on water provided by the present invention;

[0027] Figure 2 This is a schematic diagram of an embodiment of a method for assembling four sections of a ship on water provided by the present invention;

[0028] Figure 3 This is a schematic diagram of an embodiment of a method for assembling four sections of a ship on water provided by the present invention;

[0029] Figure 4 Side view of temporary bulkhead arrangement;

[0030] Figure 5 A top view of the temporary bulkhead arrangement;

[0031] Figure 6 This is the temporary bulkhead structure diagram;

[0032] Figure 7 Illustration of the arrangement of the height limit device and the code plate at the closing mouth;

[0033] Figure 8 Schematic diagram of the deck limit assembly structure;

[0034] Fig. 9 Schematic diagram of the side limit device structure;

[0035] Fig.10 yes Fig. 9 Schematic diagram of the middle A direction;

[0036] Fig.11 It is a structural schematic diagram of an anti-collision device. DETAILED DESCRIPTION

[0037] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0038] It should be understood that the descriptions involving orientations, such as up, down, front, back, left, right, etc., and the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] If the word "several" is used to describe the number, it means one or more. "More" means more than two. "Greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] The water assembling process is a construction process in which a ship or other marine engineering equipment is divided into several sections, built on a slipway or in a dock and launched separately, and then joined and assembled into a whole on the water. It is an inevitable product of production activities and their development after the large-scale ships and marine engineering equipment. The present invention further improves the water assembling method in order to improve the efficiency of water assembling.

[0042] Reference Figures 1 to 11 The present invention provides a device and method for assembling four sections of a ship on water in the following embodiments:

[0043] The present invention is based on the 45000DWT semi-submersible barge project. Because the main dimensions and empty ship weight of the ship exceed the size of the shipyard's slipway and the rated load of the launching vehicle, a 4-section water-based closing device and a water-based closing method were invented. The 45000DWT semi-submersible barge is 164m long, 65m wide, 10.2m deep, and the hull structure uses nearly 23,000t of steel. The width of Hangtong's slipway is 60m, and the comb-type launching slide can complete the upper and lower rows of ships of up to 12,000t. This cannot be achieved according to traditional shipbuilding technology. If the docks of other shipyards are rented, it will inevitably bring huge cost increases and many uncertainties, making the cost of the entire project uncontrollable. After discussion, the general idea of ​​​​segment slipway construction-water closing-tower water hoisting was determined.

[0044] According to the launching capacity of the shipyard comb-type launching slide, the main hull is divided into 4 sections, namely section 1, section 2, section 3 and section 4. The sections are arranged along the north-south direction of the slipway, referring to Figure 3 , Figure 3 This is a schematic diagram of the four sections after being joined together on water;

[0045] The weight of each section in water meets the load requirements of the launching vehicle. The draft of the section after leveling can ensure that the section can float smoothly after launching. In order to ensure the floating state of the section after launching, the four corners of the section are equipped with independent cabins. For this purpose, temporary bulkheads of 600 are set up. Figure 4 , Figure 5 and Figure 6 , Figure 4 It is a side view of the arrangement of temporary bulkhead 600, wherein 610 is a temporary sealing plate. Figure 5 The top view of the temporary bulkhead 600 is shown in FIG. Figure 6 This is a structural diagram of the temporary bulkhead 600, where: Figure 4 This is the layout diagram of the FR20 / FR38 temporary bulkhead 600.

[0046] After the temporary bulkhead 600 is set, the end face margin of the block is precisely measured and trimmed to ensure that the block can be directly butted together without cutting the margin when it is closed on the water. In order to ensure that the two end faces can be butted smoothly, in addition to simulating the docking on the computer, the block will be pre-docking with the next block on the slipway before it is launched to determine whether the end faces of the two blocks can meet the closing conditions and improve the docking efficiency.

[0047] In order to assist the above-water closure of the main section, an above-water closure auxiliary device is provided. The above-water closure auxiliary device comprises a height limiting device serving as a yard plate and a main section alignment positioning device.

[0048] Height limit device and yard plate: arranged at FR20 of 03 section, FR38 of 02 section and FR58 of 01 section. It is used as the height limit device of this section during load adjustment and positioning, and serves as the yard plate after the two sections are aligned. Figure 7 The figure shows the arrangement of the tooling at the closing mouth, 701 is the closing position, and 702 is the lifting deck.

[0049] Total section alignment positioning device: In order to assist in the positioning of the total section, an alignment positioning device is provided at the closing mouth of the total section. The limiting devices are arranged on the deck and the side outer plate, namely the deck limiting device and the side limiting device.

[0050] Reference Figure 8 The deck limit assembly 800 is arranged symmetrically at the track reinforcement Y=±18880. Figure 8 The middle is the horizontal line, and the horizontal arrow is the closing direction, which is used to assist in positioning the ship's width and length during closing.

[0051] The deck limit assembly 800 includes a first clamping piece and a second clamping piece, which are respectively arranged on adjacent section decks, for example, the first clamping piece is arranged on the front section deck surface, and the second clamping piece is arranged on the rear section deck surface, the first clamping piece is provided with a V-shaped groove, the opening of the V-shaped groove faces the second clamping piece, and the second clamping piece is provided with a V-shaped protrusion engaged with the V-shaped groove. The first clamping piece and the second clamping piece each include two positioning plates 810 and a reinforcement structure arranged at an angle, the angle range is less than 45 degrees, and round steel is arranged at the connection between the two positioning plates 810. The reinforcement structure includes a reinforcement plate 820. In the first clamping member, six reinforcement plates 820 are arranged, which are divided into two groups. One group is three reinforcement plates 820. The three reinforcement plates 820 are in an I-shaped structure and are respectively arranged on the outside of the positioning plate 810 and between the deck surface; in the second clamping member, one reinforcement plate 820 is arranged. The reinforcement plate 820 is arranged between the two positioning plates 810, and the reinforcement plate 820 is arranged parallel to the deck surface. Figure 8 It can also be seen from the AA cross-sectional view that the reinforcing plate 820 improves the structural strength. In some other embodiments, the first clamping member and the second clamping member can also be provided as two rectangular blocks, with V-shaped grooves respectively provided in the two rectangular blocks, and two chamfers cut to form V-shaped protrusions, which are not necessarily made of plate material.

[0052] The deck limit assembly 800 assists in docking, and the V-shaped groove and V-shaped protrusion meet the requirements of rough docking in the early stage and the requirements of precise docking in the later stage, and also play a guiding and positioning role.

[0053] Reference Fig. 9 and 10, where the arrow direction is the closing direction, and the side limit devices are arranged symmetrically at the waterline Z=4800, playing the role of positioning guidance and limiting in the ship width direction during the pulling and closing of the total section.

[0054] Reference Fig.11 , anti-collision device is installed on the deck and bottom plate. The anti-collision device is composed of 400*20mm anti-collision plate and reinforced bracket. It is installed at 36 locations on the entire end surface at the longitudinal position L03 / 09 / 14 / 19 / 25 / 31 / 35 / 40 / 45 of the closing end surface of the total section. The anti-collision plate is flush with the closing end surface. It is used to reduce the collision between the bottom plate and the deck of the two total sections when the two total sections are closed. The two total sections should be pulled together smoothly and slowly at the last 300mm distance, and the alignment should be monitored in real time.

[0055] Reference Figures 1 to 3 The present invention also provides an embodiment of a method for assembling four sections of a ship on water, comprising:

[0056] Step 1: After the 04 section is launched, it is ballasted and leveled. The anchor boat 100 assists the 04 section to berth at the north side of the outfitting pier 400, and the cables are brought. The 04 section is leveled by water pressure to the 2510mm closing water level;

[0057] Step 2: The 03 section is launched, water is pumped and leveled, and the 03 section is berthed at the outfitting dock 400 with the help of anchor boat 100. According to the draft of the four corners of the section, water is continued to be pumped to make the draft of the 03 section around 2450mm, which needs to be less than the draft of the 04 section;

[0058] Step 3: Hang the pulling and closing ropes 300 of the two pulling and closing winches, and the two pulling and closing winches will work together to pull the 03 main section, and the other mooring ropes of the 03 main section will cooperate with the elastic rope. The pulling and closing direction of the main section should face the direction of the water flow, and the pulling and closing action should be smooth and slow to prevent collision;

[0059] Step 4: When the closing end face of the 03 section is 300mm away from the closing end face of the 04 section, hang up the hand chain hoist and other traction devices, and the assembly personnel measure the deck surfaces of the two sections. The 03 section is symmetrically ballasted so that the two deck surfaces are basically on the same plane. At this time, the height limit device plays a role to ensure that the heights of the two deck surfaces are aligned. Measure the distance between the closing lines of the two sections: the inspection line at the deck should be flush, and the inspection line at the side should be "slightly open" at the lower end, that is, the distance between the inspection lines is greater than 400mm to ensure that the deck assembly of the two sections is completed first during assembly;

[0060] Step 5: Continue to pull together the three hand hoists to achieve the locking action of the centering limit device, and measure the deck closing ring seam alignment line, ship centerline and longitudinal section line again. The assembly deviation should meet the requirements of the "China Shipbuilding Quality Standards", see the table below. After the alignment is correct, complete the welding of the assembly code plate;

[0061] Assembly size deviation of the whole section

[0062]

[0063] Step 6: Adjust the ballast water, complete the bottom structure pressure, and use the total station non-geophysical level reference to re-measure the deck level reference. Complete the installation and welding of the bulkhead structure and the side structure. Carry out the installation and welding of the joint seams of the two sections;

[0064] Step 7: Reference Figure 3 , follow the same steps as above to complete the joining of section 02 and section 01.

[0065] In the third step of the above-water closing method, the two closing sections are roughly aligned, and then the deck closing mouth ring seam joint line, the ship centerline and the longitudinal section line are measured again. Before the closing welding, the two sections are roughly butted, and then the precise butt joint is made after careful measurement. In the rough butt joint process, the butt joint accuracy requirements are reduced, and the butt joint speed can be appropriately accelerated. After careful measurement, the precise butt joint improves the butt joint accuracy, and the butt joint speed is slowed down, but the butt joint accuracy is high. Therefore, the butt joint efficiency is improved, the butt joint accuracy is guaranteed, and the assembly deviation is met.

[0066] In the traditional water-based closure method, during the pulling and closing process, the insertion of the docking tooling should be carefully observed. If there is any deviation, the hoist should stop tightening in advance and adjust the position by towing or pushing with a tugboat. Because the initial stage of the water-based closure of the present invention does not require precise closure, but only needs to be roughly closure, the two docking sections can be misaligned within the allowable error range.

[0067] Further improvement is to set temporary bulkheads 600 at each section so that the four corners of each section form independent cabins to ensure the floating state of each section after launching. By setting independent cabins, the floating state of each section after launching is met during the docking process, which helps to dock each section more accurately.

[0068] Further improvement is to accurately measure and trim the end face margin after setting up the temporary cabin, so as to ensure that the total section can be directly butted together without cutting the margin when closing on the water.

[0069] As a further improvement, the two sections are pre-jointed on the slipway before launching to determine whether the end faces of the two sections can meet the closing conditions.

[0070] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for assembling four sections of a ship on water, characterized in that: Including: Step 1: After the 04 section is launched, it is ballasted and leveled, moored at the outfitting dock, and the cables are brought; Step 2: The 03 section is launched, water-pressed and leveled, moored at the outfitting dock, and water is continued to be pressed to make the draft of the 03 section less than the draft of the 04 section; Step 3: Hang the closing cable of the closing winch, and the closing winch acts at the same time to pull the 03 section, and other mooring cables of the 03 section cooperate with the elastic cable; Step 4: When the closing end face of the 03 section is 300mm away from the closing end face of the 04 section, hang the traction device, and the assembly personnel measure the deck surfaces of the two sections, symmetrically pressurize and ballast the 03 section so that the two deck surfaces are in the same plane, Measure the distance between the two closing lines. The inspection lines at the deck should be flush, and the inspection line spacing at the side should be greater than 400mm; Step 5: Continue to pull together through the traction device to achieve the locking action of the centering limit device, and measure the deck closing ring seam alignment line, the centerline and the longitudinal section line again to meet the assembly deviation requirements and weld the assembly code plate; Step 6: Adjust the ballast water, complete the pressure of the bottom structure, re-measure the deck horizontal reference, complete the code plate assembly and welding of the bulkhead structure and the side structure, and carry out the assembly and welding of the closing seams of the two sections; Step 7: Repeat steps 1 to 6 to complete the closing of the 02 section and the 01 section; In the first step, the 04 main section was water-pressurized and leveled to the closing water level of 2510 mm. In the second step, the draft of the 03 main section was around 2450 mm. In the third step: the pulling and closing direction of the 03 total section should face the direction of the water flow, and the pulling and closing action should be smooth and slow; The traction device includes a hand chain hoist; The assembly deviation shall meet the requirements of China Shipbuilding Quality Standards; By setting temporary bulkheads at each section, the four corners of each section form independent cabins to ensure the buoyancy of each section after launching; After the temporary cabin is set up, the trimming and closing end face margins are precisely measured; To ensure that the two ends can be docked smoothly, in addition to simulating docking on the computer, the two sections are pre-docked on the slipway before launching to determine whether the two ends can meet the closing conditions and improve docking efficiency. It also includes a deck limiting assembly, the deck limiting assembly includes a first clamping piece and a second clamping piece arranged on adjacent decks of the entire section, the first clamping piece is provided with a V-shaped groove, and the second clamping piece is provided with a V-shaped protrusion engaged with the V-shaped groove; The first clamping member and the second clamping member each include two positioning plates arranged at an angle and staggered with each other, and a reinforcing structure arranged on the positioning plates.

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